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Proceedings Paper

Local adaptive filter in predictive coding
Author(s): Yu Li; Yun He
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Paper Abstract

Standard hybrid video coding systems are based on motion compensated prediction with fractional pel displacement vector resolution. In H.264/AVC, a fixed 6-tap interpolation filter is used to generate the half-pel resolution referenced blocks. Considering the non-stationary statistical properties of picture sequences, some adaptive interpolations are introduced in published papers. A practical scheme is proposed to use a three-parameter 1D filter for a whole frame subject to the statistical properties of the source pictures. The problem for such approach is that a universal filter for the whole picture can not adapt to the local changes, it is not considered as the optimal solution to the prediction. In this paper, a local adaptive filter is proposed to adapt to the local statistics of the picture structure. 2D Wiener-Hopf filter of different sizes are simulated to show the possibility of decreasing the prediction error. A better performance to the prediction error as well as the total coding performance compared to the 1D adaptive filtering can be achieved.

Paper Details

Date Published: 24 June 2005
PDF: 8 pages
Proc. SPIE 5960, Visual Communications and Image Processing 2005, 59606L (24 June 2005); doi: 10.1117/12.633515
Show Author Affiliations
Yu Li, Tsinghua Univ. (China)
Yun He, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 5960:
Visual Communications and Image Processing 2005
Shipeng Li; Fernando Pereira; Heung-Yeung Shum; Andrew G. Tescher, Editor(s)

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